Apr 16, 2013 12:00pm PDT
campbell of medford, mass. she was reportedly at the finish line as a spectator. we're still waiting on the name of the third victim. and as we wait, there are two main aspects to this story now. what happened and the investigation into what happened. we begin with that. and nbc news justice correspondent pete williams. pete, what do officials know? what are they saying? >> well, consider this interesting fact. i just talked to a person who has done a lot of bomb investigations who says that under normal conditions, it is possible to gather up 93 to 98% of the bomb devices themselves. even though they will be in little pieces and will be all bent up. most of the bombs will not be consumed by the explosion. so they're optimistic that they will have within a fairly short time here, it may take a couple of days, a pretty good idea of exactly how these devices were made. and already they say they have a rough idea of what components were used to make the bombs. unfortunately, these are very common methods. there is nothing that really stands out. they say that the pieces were assembled i
Apr 18, 2013 12:00pm PDT
lady did. we know the two of them visited with the fakly of the 29-year-old victim krystle campbell when they first arrived at the church. after the fact mr. obama and his wife split up. he went to mass general where he visited with some of the survivors as well as some of the families of some of the victims and the staff. his wife we're just now learning in the last few minutes spent the last hour at brigham and women's hospital and children's hospital speaking with some of the youngest affected by this awful tragedy. this is a very personal story not just for the president but entire white house. dennis mcdonough with ties to boston. some of his tice including lisa monaco who briefed him on the latest on the investigation just moments before he took off earlier today. >> peter alexander. thank you very much. i also want to bring in two membership, michael ross whose city council office is near where the bombs went off and mr. walker. you just heard peter alexander describe the president's tone as defiant. what was the mood like at the memorial service today among the people there?